Steffens RV-7 building site!

Installed firewall

Today I checked a very critical item off the list, aligning and drilling of the firewall assembly. First I had to trim the longerons to the correct lenght, ¾” behind the forward edge of the sideskins. After marking, I used my die grinder with the cutting disc to cut them. Unfortunately I had to trim of another 1/16″ off, to make the firewall fit correctly.
Fuselage 051 [400x]

Then I had to make 4 attach strips, that attaches the F-704 bulkhead to the longerons.
Fuselage 052 [400x]

Fuselage 053 [400x]

Fuselage 054 [400x]

Fuselage 056 [400x]

After clamping the firewall assembly to the longerons and sideskins, I marked the centerline on the firewall lower stiffener. I found this precision compass, which works great for drawing centerlines.
Fuselage 055 [400x]

Now I could fit the forward bottom skin…
Fuselage 057 [400x]

After a bunch of adjusting and finetuning the position of the firewall assembly, I drilled it to the longerons and skins.
Fuselage 058 [400x]

…a look inside, the longerons have been matchdrilled to the firewall steelbrackets. Later on the engine mount will be bolted to these brackets. The landing gear then bolts onto the engine mount.
Fuselage 059 [400x]

Fuselage 060 [400x]


  1. Kent

    Hej Steffen.
    Det hele begynder at tage form. Ser godt ud.Nice work. Følger dig minutiøst. Jeg ringer til dig en dag jeg er på Veerst kanten og ser det hele lidt nærmere an. Og så i øvrigt held og lykke med det andet projekt du og konen har på bedding.
    Hilsen Kent

  2. Dan McDermott

    Hello! This is Dan McDermott. We haven’t met yet but I am a friend of Soren Andersen and he has guided me to your website. I am in the planning mode of an RV-7a. By planning, I mean that I plan to build one in the future (3-5 years from now) as I am traveling too much with LM right now to to conduct a project like this. I am am currently flying my Piper Cherokee in the US. Made the mistake of going to Oshkosh this year and got bit by the RV bug and now have the need for speed and some light aerobatics (when my wife is not in the co-pilot’s seat). I look forward to meeting you and watching your progress!

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